Explosion

Info

A TNT explosion.

An explosion is a physical event, generally destructive, that can be caused by several different circumstances. It can destroy nearby blocks Blocks may refer to: Block - cubes that make up the Minecraft world as a whole. Blocks music disc This disambiguation page lists articles associated with the same title. If an internal link led you , propel and damage nearby players The Player Health points 20 () Armor points Varies Attack strength Fist: 1 () Items: Varies Size Height: 1.8 Blocks Width: 0.6 Blocks While sneaking: Height: 1.65 Blocks Width: 0.6 Blocks While gliding: Height: 0.6 , entities A player standing in front of a large group of entities The hitboxes of several entities. Note the blue line which points to the direction the entity is "facing." Entities encompass all dynamic, moving objects , and their armor Armor Type Wearable items Durability See Durability Renewable Yes Stackable No Data values See Data values Name See Data values For the armor that can be worn by horses, see Horse Armor. Armor classes. From , and cause one or more fires Fire Transparency Yes Luminance Yes, 15 Blast resistance 0 Tool Any tool Renewable No Stackable N/A Flammable No Drops None Data value dec: 51 hex: 33 bin: 110011 Name fire Fire is a harmful non-solid block. Contents 1 under correct circumstances. Explosions produce a "shockwave" particle Particles are special graphical effects in Minecraft. Contents 1 Behavior 2 Types of particles 3 History 4 Issues 5 Trivia 6 Gallery Behavior edit | edit source] Particles always seem to face the player and effect.

Multiple close explosions may propel objects further, but have no cumulative effect on the destruction of a block See the various blocks found in Minecraft. For the blocking with shields that reduces damage when performed, see Blocking. All blocks Blocks are the basic units of structure in Minecraft. Contents 1 . This is because explosions` damage to blocks is evaluated individually (per explosion), and blocks` blast resistance does not become "weakened" per explosion.

"Destroyed" blocks have a chance of dropping as collectible resources (and otherwise disappear), and this chance is ¹⃢₁₄_p, where p is the explosion power. So, a creeper blast (uncharged) will have a ¹⃢₁₄₃ chance of dropping a block.

The propulsion effect of explosions is often used for TNT cannons, and can also be used to shoot out gravity affected blocks.

Explosion strength

Explosion Type	Power	Notes
Wither (when created)	7
Ender crystal (when attacked)	6
Charged creeper	6	Drops heads or skulls of mobs killed by explosion
Bed (when used in the Nether Nether may refer to: The Nether, a hell-like dimension, filled with fire, lava, and dangerous mobs. Advancements#Nether, an advancement by entering the Nether dimension. This disambiguation page lists articles associated with the same title. If or the End See the dimension. For the achievement, see Achievements#The End.. For the advancement, see Advancements#The End. A view of the central End island. The ender dragon can be seen flying around obsidian pillars, )	5	Starts fires
TNT	4
Creeper	3
Ghast fireball	1	Starts fires
Black wither skull	1
Blue wither skull	1	Treats blast radius blocks (except bedrock, end portal, end portal frame, command block, structure block, structure void and barrier) as having a blast resistance of less than 4.

Despite being damaging to entities, fireworks do not destroy terrain and as such are not counted as conventional explosions.

Videos

Model of block destruction

1352 rays from the explosion center to points that uniformly distributed on the surface of a cube centered at the explosion with an edge length of 2. (Be that as it may, this only defines their directions, not their length)

The roughly spherical pattern of blocks destroyed can be seen here (Note:A resource pack is being used in order to more clearly see the pattern through the glass).

An explosion can destroy nearby blocks. Its blast effect is evaluated independently on many explosion rays originating from the explosion center, as shown in the right figure.

An explosion must be very powerful (power ~1542860) to destroy a bedrock block

1. A cube around the explosion is divided into a 16⃗16⃗16 grid, and rays are created from the center to each outer point of this grid
2. Each ray is given an intensity, calculated as (0.7 + a random value from 0 to 0.6) ⃗ power
3. For every 0.3 blocks along the ray, the intensity of the ray decays/is attenuated by 0.3⃗0.75 (0.225), and the block it passes through absorbs/reduces it by (blast resistance/5+0.3)⃗0.3
4. The ray destroys all blocks that could not end the ray at any checkpoint

From the above process, the following results can be deduced (where ⌊x⌋ is the floor function):

• The blast radius in the air of an explosion (i.e. only attenuated, not absorbed by blocks)= == 10.2 (charged creepers), 6.9 (TNT), 5.1 (creepers), 1.5 (fireballs). For instance, a TNT explosion can destroy a torch Torch Transparency Yes Luminance 14 Blast resistance 0 Tool Any tool Renewable Yes Stackable Yes (64) Flammable No Drops Itself Data value dec: 50 hex: 32 bin: 110010 Name torch See the common light-emitting torch. 7 blocks away. But how many blocks an explosion can destroy is non-deterministic and also dependent on the specific location of the explosion.
• The minimum block resistance required to absorb maximum blast force of an explosion happening in nearby air= ((1.3⃗ power− attenuation steps⃗ step length⃗ 0.75)/step length− 0.3)⃗ 5. To not be destroyed, a block has to absorb all blast force at the first checkpoint in it.
  • The attenuation steps is subject to collision restrictions. For explosion in air, there is at least one attenuation step. TNT and creeper explosion are always 0.49 and 0.5 meter away from nearest block (2 att. steps), but fireball explosion can happen anywhere (1 att. step).
  • Thus, the block resistances are 121.00 (charged creepers), 77.67 (TNT), 56.00 (creepers), 16.42 (fireballs).
  • So water, lava (Note: Only the stationary block) obsidian, and bedrock are always indestructible, and fences Fence Transparency Yes Luminance No Blast resistance 15 (Wood) 30 (Nether Brick) Tools Renewable Wood: Yes Nether Brick: No Stackable Yes (64) Flammable Wood: Yes Nether Brick: No Drops Itself Data values See Data values and less blast-resistant blocks can be destroyed by fireballs. These are theoretical values, and in reality less resistant blocks are not always destroyed, and since Minecraft Minecraft Author(s) Mojang AB (Credits) Markus "Notch" Persson (Creator) Jens "Jeb" Bergensten (Lead Developer) Jon "jonkagstrom" Kågström (AI Programmer) Nathan "Dinnerbone" Adams Erik "Grum" Broes Michael "Searge" Stoyke Thomas "ProfMobius" Guimbretière Agnes "LadyAgnes" Larsson Maria is supposed to be simple, there is no such mechanic.

Interaction with entities

An explosion has different effects on entities A player standing in front of a large group of entities The hitboxes of several entities. Note the blue line which points to the direction the entity is "facing." Entities encompass all dynamic, moving objects than blocks. Entities are damaged and propelled by an explosion if within its damage radius of 2 ⃗ power. Note that the "damage radius" is different from the blast radius of explosion effect on blocks.

1. For every entity within a 2⃗power block sphere of the explosion center, the impact is (1-distance from explosion/power/2)⃗exposure (see section below on exposure)
2. The entity is damaged by (impact⃗impact+impact)⃗8⃗power+1 (armor enchantments for damage are handled separately)
3. After damage, exposure is reduced by (exposure⃗max blast protection from all armor⃗0.15)
4. The entity`s eyes are propelled along the ray from the explosion center by the new exposure

From the above process, the following results can be deduced:

• Entities will always get at least 1 point of damage if they are within the radius, regardless of their explosion exposure.
• The maximum damage that entities can take (at the explosion center with 100% exposure)= (1⃗ 1+ 1)⃗ 8⃗ power+ 1 point of damage= 97 (charged creeper), 65 (TNT), 49 (creepers), 17 (fireballs). When entities are away or covered by blocks from the explosion center, they take less damage.
• The maximum velocity gain that an entity can obtain from a TNT explosion is 1, at the explosion center with 100% exposure.

A primed TNT AABB has directionally asymmetrical sample points (1/2.96 spacing) because of rounding.

Calculation of explosion exposure

1. The entity`s bounding box is divided into a 2⃗width+1 by 2⃗height+1 by 2⃗depth+1 grid of unequally spaced points
2. A ray is drawn from the explosion center to each point
3. The exposure of the entity is the percentage of these rays that are unobstructed

The approximation algorithm has sampling error that results in directional asymmetry of propulsion. For instance, a typical TNT cannon A TNT cannon is a mechanism that uses TNT or minecarts with TNT to launch primed TNT or other entities. Contents 1 General 1.1 Main components 1.2 Basic concepts 2 Naming standards 2.1 Common names has maximum range in the west direction partly because the primed TNT has largest sampled exposure in that direction.

Causing fire

If the explosion has the ability, it randomly starts fires in ⃢₅ₓ of all destroyed air blocks that are above opaque When leaves are opaque (in "fast" graphics), they completely block rendering. When leaves are transparent (in "fancy" graphics), the world behind them is also rendered. Opacity (and its inverse, transparency) are properties of blocks with blocks.

Prolonged lag

In addition to the initial lag from processing the explosion, which subsides once the explosion has occurred, there can also be a prolonged fallout from an explosion, that consists of dropped items, liquid-physics, and increased render-complexity of the crater. Technically the dropped items will disappear after 5 minutes, however those 5 in-game minutes may take a long time to process during extreme lag.

Using certain rules and commands can avoid this prolonged lag: setting the gamerule doTileDrops to false, for instance with /gamerule doTileDrops false, will stop dropped items from being generated by explosions. Also, the command /kill @etype=Item will destroy all dropped items.

Blast resistance

edit values

Typical damage radius

The player will receive damage, if within these radii of a 100% exposure ground 1-block, 2-blocks, or 4-blocks of TNT explosion, with the amount of damage labeled on

Contents

Causes

Explosions can be caused by:

• A primed TNT block
• Creepers and their charged counterparts
• Attempting to sleep in a bed while in any dimension other than the Overworld
• Ghast fireballs
• Wither projectiles, as well as the initial explosion when summoning the Wither
• Punching an Ender Crystal

Properties

• Position. A TNT explosion happens at the center of a primed TNT which is a 0.98 ℂₗ 0.98 ℂₗ 0.98 cube. A bed explosion happens at the center of the bed block (not destroyed before the explosion).

• Ability to generate fire. The only types of explosions that can generate fire are beds and Ghast fireballs
• Power. The power-level of each type of explosion is as follows (from weakest, to strongest):
  • 1 - Ghast`s fireball
  • 1 - Wither skull projectiles (Both black and blue variants)
  • 3 - Creeper explosions (Not charged)
  • 4 - Primed TNT
  • 5 - Attempting to sleep in a bed in any dimension other than the overworld
  • 6 - Charged Creeper explosions
  • 6 - Ender Crystals
  • 7 - The initial blast when summoning the Wither

Through the use of commands, it is possible to create entities such as Primed TNT and Ghast fireballs with a larger explosion power.

Model of block destruction

An explosion can destroy nearby blocks. The damage done depends on a ray system.

• A cube around the explosion epicenter is made and divided into a 16x16x16 grid. A ray is drawn from the center to each outer cube, resulting in 1,352 rays.
• Each ray has starts out with a blast force between 0.7⃗power and 1.3⃗power.
• The effect of the explosion is examined at various intervals on the ray with a step length of 0.3.
• The blast force is lowered by (block resistance / 5 + 0.3) times the step length by the non-air block (regardless of if the block was destroyed) at the every checkpoint, and futher weakend by step length⃗0.75 between checkpoints, until completely absorbed or attenuated.
• A block is considered destroyed if it can`t completely absorb the blast force at any checkpoint in it (air blocks can be destroyed too).

The following results can be derived from the above:

• The blast radius of an explosion that is not absorbed by any blocks (In the open air) is equal to 1.3 * (power)/(step length*.75)*step length. This gives the radius of an explosion not blocked by any blocks.
  • Blast Radii:
    • The Wither summon blast has a range of 12.1 blocks
    • Charged Creepers: 10.2 blocks
    • Ender Crystals: 10.2
    • Non-Overworld Beds: 8.6
    • Primed TNT: 6.9
    • Normal Creepers: 5.2
    • Ghast Fireballs: 1.5
    • Both Variants of Wither Skull Projectiles: 1.5
• The Minimum block resistance required is a similar equation given by the (blast radius) * (5). For a block to not be destroyed, it must absorb all of the blast force (i.e have enough blast resistance) of the explosion.
  • Block Resistances:
    • 142.67 - Initial Wither Summon Blast
    • 121.00 - Charged Creepers & Ender Crystals
    • 99.3 - Non-Overworld Beds
    • 77.67 - Primed TNT
    • 56.0 - Normal Creepers
    • 16.42 - Ghast Fireballs & Wither Skulls (Only the Black variant)

By normal means, lava, water, obsidian, and bedrock are indestructible by explosions, all their blast resistances are over 500. Note: Explosions do not have a cumulative effect on blocks. Multiple explosions at once will not destroy a block with a higher blast resistance than the initial blast. Blocks do not have "temporary health" and don`t manage damage from explosions, and the status of the block is monitored independently on each new explosion, not cumulatively.

Note: Destroyed blocks only have a 30% chance of being dropped as an item.

Interaction with entities

An explosion has different effects on entities than blocks. Entities are damaged and propelled by an explosion if within its damage radius of 2 ⃗ power. Note that the "damage radius" is different from the blast radius of explosion effect on blocks.

• For each entity within the radius, define impact = (1 - distance from the explosion / radius) ⃗ exposure.
• Apply (impact² + impact) ⃗ 8 ⃗ power + 1 point (half-heart, so we don`t have to divide by 2 everywhere) of damage to the entity.
• Propel the entity so that its velocity increases by impact in the direction from explosion to the entity.

From the above process, the following results can be deduced:

• Entities will always get at least 1 point of damage if they are within the radius, regardless of their explosion exposure.
• The maximum damage that entities can take (at the explosion center with 100% exposure) = (1 ⃗ 1 + 1) ⃗ 8 ⃗ power + 1 point of damage = 113 (56.5) (summoning wither), 97 (48.5) (charged creeper, ender crystal), 81 (40.5) (bed Nether/End), 65 (32.5) (TNT), 49 (24.5) (creepers), 17 (8.5) (fireballs, wither skull). When entities are away or covered by blocks from the explosion center, they take less damage.
• The maximum velocity gain that an entity can obtain from a TNT explosion is 1, at the explosion center with 100% exposure.

Different damage effects will ensue. For example, existing items will be destroyed, and the armor on the player will absorb part of the damage. Items dropped in the process of, or actually after, the explosion are not affected because they have no interaction between the explosion.

The propulsion effect is often used for TNT cannons.

Calculation of explosion exposure

Explosion exposure is simply how much an entity is visible from the explosion center and is approximated with the ratio of visible sample points on the entity. The approximation algorithm has sampling error that results in directional asymmetry of propulsion. For example, a typical TNT cannon has a maximum range in the west direction partly because the primed TNT has largest sampled exposure in that direction.

Causing fire

If the explosion has the ability to cause fires, it will randomly start fires in 1/3 of all destroyed air blocks that are above opaque blocks. This is bugged and doesn`t occur in versions Beta 1.6 - Beta 1.8.

Blast Resistance

Typical damage radii

The player will get certain damage if these radii are within an area of a 100% exposure ground 1-, 2-, or 4-TNT explosion as shown